Wrong Material in Render

[junebug]

The material of my first floor appears different in the render than in the actual model, I've redone the texture and the render is still different. Is this a bug? Or is something wrong with my model that I don't know of?

[Fletch]

Welcome Junebug,
Most likely your floor is a reversed face.
Switch to monochrome view and if it's blueish, then it's reversed.
Right-click face and choose "reverse face". Paint front faces only.

Please see tutorials linked in my signature. The video series linked below is a great all-around start as it covers all 6 essentials to rendering with SketchUp and Twilight Render.